Filter Case 73 : Stainless Steel Ogawa Microstar Sub Micron USA Carbon Block

Today preparing to change this USA carbon block.
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Open it and take out the old carbon filter.
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This is the old USA sub micron carbon filter.
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Prepare change the new one.
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Pre-filter is ceramic filter candle.
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Changed done.
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Flushing water about 30 minutes.
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